Custom application. OEM styling inner tin primary housing to used replace the OEM aluminum inner primary. This cover is about 3/16" deeper than OEM style 55-64 inner tin primary (MCS 555801/555806) where cover mounts to the crankcase. Kickstart only. Note: Will require a tin / steel outer primary cover (955817 smooth chrome, 555816 OEM style chrome; 555834 OEM style black) that works with the OEM compensating sprocket. Note: Some spacing may be required between crankcase and cover